Month August 2009

Gunpowder is a mixture of sulphur, charcoal, and potassium nitrate. It burns rapidly, producing a volume of hot gas, Because of its burning properties and the amount of heat and gas volume that it generates, gunpowder has been widely used…

A trebuchet is a siege engine that was employed in the Middle Ages. It is sometimes called a “counterweight trebuchet” or “counterpoise trebuchet” to distinguish it from an earlier weapon that has come to be called the “traction trebuchet”, the…